HTML canvas shadowOffsetY用法及代碼示例

canvas shadowOffsetY屬性用於設置或返回陰影與形狀的垂直距離。此屬性保持正值或負值，其中正值指示底部陰影，負值指示頂部陰影。

用法:

context.shadowOffsetY = number

屬性值：

number:用於設置代表陰影的垂直距離的正數或負數。

示例1：

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML canvas shadowOffsetY Property 
    </title> 
</head> 
  
<body> 
    <canvas id="GFG"
            width="500" 
            height="300"> 
  </canvas> 
  
    <script> 
        var x = 
            document.getElementById("GFG"); 
        var contex = 
            x.getContext("2d"); 
        contex.shadowBlur = 20; 
        
        // vertical distance of shadow 
        contex.shadowOffsetY = 40; 
        contex.shadowColor = "blue"; 
        contex.fillStyle = "green"; 
        contex.fillRect(50, 50, 350, 200); 
        contex.stroke(); 
    </script> 
  
</body> 
  
</html>

輸出：

示例2：

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML canvas shadowOffsetY Property 
    </title> 
</head> 
  
<body> 
    <canvas id="GFG" 
            width="500"
            height="300"> 
  </canvas> 
  
    <script> 
        var x = 
            document.getElementById("GFG"); 
        var contex = 
            x.getContext("2d"); 
        contex.shadowBlur = 5; 
  
        // vertical distance of shadow. 
        contex.shadowOffsetY = -40; 
        contex.shadowColor = "rgb(0, 153, 0)"; 
        contex.fillStyle = "rgb(255, 0, 255)"; 
        contex.fillRect(50, 50, 350, 200); 
        contex.stroke(); 
    </script> 
  
</body> 
  
</html>

輸出：

支持的瀏覽器：

穀歌瀏覽器
Internet Explorer 9.0
火狐瀏覽器
蘋果瀏覽器
Opera

相關用法

注：本文由純淨天空篩選整理自R_Raj大神的英文原創作品 HTML | canvas shadowOffsetY Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。